arch/mips/bcm47xx/setup.c

   1 /*
   2  *  Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
   3  *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
   4  *  Copyright (C) 2006 Michael Buesch <m@bues.ch>
   5  *  Copyright (C) 2010 Waldemar Brodkorb <wbx@openadk.org>
   6  *  Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include "bcm47xx_private.h"
  30
  31 #include <linux/bcm47xx_sprom.h>
  32 #include <linux/export.h>
  33 #include <linux/types.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/phy.h>
  36 #include <linux/phy_fixed.h>
  37 #include <linux/ssb/ssb.h>
  38 #include <linux/ssb/ssb_embedded.h>
  39 #include <linux/bcma/bcma_soc.h>
  40 #include <asm/bmips.h>
  41 #include <asm/bootinfo.h>
  42 #include <asm/idle.h>
  43 #include <asm/prom.h>
  44 #include <asm/reboot.h>
  45 #include <asm/time.h>
  46 #include <bcm47xx.h>
  47 #include <bcm47xx_board.h>
  48
  49 /*
  50  * CBR addr doesn't change and we can cache it.
  51  * For broken SoC/Bootloader CBR addr might also be provided via DT
  52  * with "brcm,bmips-cbr-reg" in the "cpus" node.
  53  */
  54 void __iomem *bmips_cbr_addr __read_mostly;
  55
  56 union bcm47xx_bus bcm47xx_bus;
  57 EXPORT_SYMBOL(bcm47xx_bus);
  58
  59 enum bcm47xx_bus_type bcm47xx_bus_type;
  60 EXPORT_SYMBOL(bcm47xx_bus_type);
  61
  62 static void bcm47xx_machine_restart(char *command)
  63 {
  64         pr_alert("Please stand by while rebooting the system...\n");
  65         local_irq_disable();
  66         /* Set the watchdog timer to reset immediately */
  67         switch (bcm47xx_bus_type) {
  68 #ifdef CONFIG_BCM47XX_SSB
  69         case BCM47XX_BUS_TYPE_SSB:
  70                 if (bcm47xx_bus.ssb.chip_id == 0x4785)
  71                         write_c0_diag4(1 << 22);
  72                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  73                 if (bcm47xx_bus.ssb.chip_id == 0x4785) {
  74                         __asm__ __volatile__(
  75                                 ".set\tmips3\n\t"
  76                                 "sync\n\t"
  77                                 "wait\n\t"
  78                                 ".set\tmips0");
  79                 }
  80                 break;
  81 #endif
  82 #ifdef CONFIG_BCM47XX_BCMA
  83         case BCM47XX_BUS_TYPE_BCMA:
  84                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  85                 break;
  86 #endif
  87         }
  88         while (1)
  89                 cpu_relax();
  90 }
  91
  92 static void bcm47xx_machine_halt(void)
  93 {
  94         /* Disable interrupts and watchdog and spin forever */
  95         local_irq_disable();
  96         switch (bcm47xx_bus_type) {
  97 #ifdef CONFIG_BCM47XX_SSB
  98         case BCM47XX_BUS_TYPE_SSB:
  99                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
 100                 break;
 101 #endif
 102 #ifdef CONFIG_BCM47XX_BCMA
 103         case BCM47XX_BUS_TYPE_BCMA:
 104                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
 105                 break;
 106 #endif
 107         }
 108         while (1)
 109                 cpu_relax();
 110 }
 111
 112 #ifdef CONFIG_BCM47XX_SSB
 113 static void __init bcm47xx_register_ssb(void)
 114 {
 115         int err;
 116         char buf[100];
 117         struct ssb_mipscore *mcore;
 118
 119         err = ssb_bus_host_soc_register(&bcm47xx_bus.ssb, SSB_ENUM_BASE);
 120         if (err)
 121                 panic("Failed to initialize SSB bus (err %d)", err);
 122
 123         mcore = &bcm47xx_bus.ssb.mipscore;
 124         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 125                 if (strstr(buf, "console=ttyS1")) {
 126                         struct ssb_serial_port port;
 127
 128                         pr_debug("Swapping serial ports!\n");
 129                         /* swap serial ports */
 130                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 131                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 132                                sizeof(port));
 133                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 134                 }
 135         }
 136 }
 137 #endif
 138
 139 #ifdef CONFIG_BCM47XX_BCMA
 140 static void __init bcm47xx_register_bcma(void)
 141 {
 142         int err;
 143
 144         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 145         if (err)
 146                 panic("Failed to register BCMA bus (err %d)", err);
 147 }
 148 #endif
 149
 150 /*
 151  * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
 152  * to detect memory and record it with memblock_add.
 153  * Any extra initializaion performed here must not use kmalloc or bootmem.
 154  */
 155 void __init plat_mem_setup(void)
 156 {
 157         struct cpuinfo_mips *c = &current_cpu_data;
 158
 159         if (c->cputype == CPU_74K) {
 160                 pr_info("Using bcma bus\n");
 161 #ifdef CONFIG_BCM47XX_BCMA
 162                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 163                 bcm47xx_register_bcma();
 164                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 165 #ifdef CONFIG_HIGHMEM
 166                 bcm47xx_prom_highmem_init();
 167 #endif
 168 #endif
 169         } else {
 170                 pr_info("Using ssb bus\n");
 171 #ifdef CONFIG_BCM47XX_SSB
 172                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 173                 bcm47xx_sprom_register_fallbacks();
 174                 bcm47xx_register_ssb();
 175                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 176 #endif
 177         }
 178
 179         _machine_restart = bcm47xx_machine_restart;
 180         _machine_halt = bcm47xx_machine_halt;
 181         pm_power_off = bcm47xx_machine_halt;
 182 }
 183
 184 #ifdef CONFIG_BCM47XX_BCMA
 185 static struct device * __init bcm47xx_setup_device(void)
 186 {
 187         struct device *dev;
 188         int err;
 189
 190         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 191         if (!dev)
 192                 return NULL;
 193
 194         err = dev_set_name(dev, "bcm47xx_soc");
 195         if (err) {
 196                 pr_err("Failed to set SoC device name: %d\n", err);
 197                 kfree(dev);
 198                 return NULL;
 199         }
 200
 201         err = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
 202         if (err)
 203                 pr_err("Failed to set SoC DMA mask: %d\n", err);
 204
 205         return dev;
 206 }
 207 #endif
 208
 209 /*
 210  * This finishes bus initialization doing things that were not possible without
 211  * kmalloc. Make sure to call it late enough (after mm_init).
 212  */
 213 void __init bcm47xx_bus_setup(void)
 214 {
 215 #ifdef CONFIG_BCM47XX_BCMA
 216         if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
 217                 int err;
 218
 219                 bcm47xx_bus.bcma.dev = bcm47xx_setup_device();
 220                 if (!bcm47xx_bus.bcma.dev)
 221                         panic("Failed to setup SoC device\n");
 222
 223                 err = bcma_host_soc_init(&bcm47xx_bus.bcma);
 224                 if (err)
 225                         panic("Failed to initialize BCMA bus (err %d)", err);
 226         }
 227 #endif
 228
 229         /* With bus initialized we can access NVRAM and detect the board */
 230         bcm47xx_board_detect();
 231         mips_set_machine_name(bcm47xx_board_get_name());
 232 }
 233
 234 static int __init bcm47xx_cpu_fixes(void)
 235 {
 236         switch (bcm47xx_bus_type) {
 237 #ifdef CONFIG_BCM47XX_SSB
 238         case BCM47XX_BUS_TYPE_SSB:
 239                 /* Nothing to do */
 240                 break;
 241 #endif
 242 #ifdef CONFIG_BCM47XX_BCMA
 243         case BCM47XX_BUS_TYPE_BCMA:
 244                 /* The BCM4706 has a problem with the CPU wait instruction.
 245                  * When r4k_wait or r4k_wait_irqoff is used will just hang and
 246                  * not return from a msleep(). Removing the cpu_wait
 247                  * functionality is a workaround for this problem. The BCM4716
 248                  * does not have this problem.
 249                  */
 250                 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 251                         cpu_wait = NULL;
 252                 break;
 253 #endif
 254         }
 255         return 0;
 256 }
 257 arch_initcall(bcm47xx_cpu_fixes);
 258
 259 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
 260         .link   = 1,
 261         .speed  = SPEED_100,
 262         .duplex = DUPLEX_FULL,
 263 };
 264
 265 static int __init bcm47xx_register_bus_complete(void)
 266 {
 267         switch (bcm47xx_bus_type) {
 268 #ifdef CONFIG_BCM47XX_SSB
 269         case BCM47XX_BUS_TYPE_SSB:
 270                 /* Nothing to do */
 271                 break;
 272 #endif
 273 #ifdef CONFIG_BCM47XX_BCMA
 274         case BCM47XX_BUS_TYPE_BCMA:
 275                 if (device_register(bcm47xx_bus.bcma.dev))
 276                         pr_err("Failed to register SoC device\n");
 277                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 278                 break;
 279 #endif
 280         }
 281         bcm47xx_buttons_register();
 282         bcm47xx_leds_register();
 283         bcm47xx_workarounds();
 284
 285         fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
 286         return 0;
 287 }
 288 device_initcall(bcm47xx_register_bus_complete);